There's also a YouTube video of someone doing it at home and testing shooting it with a gun to stop bullets.

Stronger Than Steel, Able to Stop a Speeding Bullet--It's Super Wood!

Simple processes can make wood tough, impact-resistant—or even transparent

There's a "yes and..." Sodium sulfide is a pretty toxic substance. I had to use a kraft process to artificially weaken some wood prism I was testing during my PhD and the handling requirements are not insignificant.